Circus Diablo is an American rock band, formed in early 2006 by Billy Morrison (vocals), Billy Duffy (lead guitar) and Ricky Warwick (rhythm guitar). Fuel frontman Brett Scallions and Velvet Revolver drummer Matt Sorum subsequently joined the band on bass and drums, respectively. To date, Circus Diablo have released one studio album, entitled Circus Diablo.
The band's most recent touring incarnation featured Morrison alongside Rob Patterson (lead guitar), Patrick Cornell (bass) and Charles Ruggiero (drums). The band is not currently active, however, in a recent interview Morrison stated that "Circus Diablo is always together. We can get together and make music when we feel like it."